Thoreau’s Illustrated Atlas, 1849-1860, part 2

70. Town of Concord .Sept. 16, 1851 Reestablishedthe line between Concord and Sudbury from the stone near the Powder Mill and the channel of the river through mound rock crossing.4 public roads

71.Town of Concord. Sept. 17, 1851 Reevaluated the line between Concord and Lincoln.Commencing at the middle of the Concord River opposite the mound rock at the termination of the line between Concord and Sudbury and measuring thence by the channel of the river etc.,